Ruffneck FX6 Series Explosion Proof Electric Unit Heater, 20000W, 480V, 3 Phase

Ruffneck FX6 heaters are cULus-certified for use in hazardous locations. They are designed for the harshest environments such as dry indoor industrial applications, oil refineries, petrochemical plants, pulp and paper mills, grain elevators, hazardous waste storage facilities, wastewater treatment plants, etc., where specific explosive gases or dust may be present. Suitable for extreme environments with low ambient operating temperatures as low as -58 F (-50 C). The FX6 offers a larger junction box for easier installation, additional limit controls, and a heavy-duty core. Two levels of pressure and thermal protection provided standard on all units for best-in-class safety and reliability. The heater core assembly is contained in a sturdy, epoxy-coated 12-gauge steel cabinet, which also carries the motor and fan assembly. Adjustable louvers allow directional control of the airflow. A narrow gap, two-piece fan guard is provided to shield all moving parts. All fasteners are zinc plated for corrosion protection. Ruffneck heaters are built to last. All Ruffneck products are subjected to exhaustive technical analysis and testing during design and development and are manufactured under a registered quality assurance program. As a result, they have consistently proven their safety and reliability. For hazardous location heating, rely on the Ruffneck FX6 heater for the most dependable, trouble-free service available. Features: Hazardous Location Rating: Class I, Divisions 1 and 2; Groups C and D; Class II, Groups E, F and G; Class II Division 2, Groups F & G; Class I Zones 1 & 2, Groups IIA & IIB Temperature Code T3B [329 F (165 C)]Enclosures: NEMA Type 7 & 9. For dry, indoor use only. Do not immerse in water. Do not store or use in areas exposed to rain or snowBackup over pressure protection standard on all heaters. Standard unit now has low ambient operating ranges to -58 F (-50 C) Backup over temperature protection with dedicated contactorTwo levels of over temperature protection new standard on all FX6 heatersMotor Type: Explosion-proof. Thermally protected. Permanently lubricated ball bearings. 1725 RPMFan: Aluminum blade. Steel spider and hub with 5/8" (15-7/8 mm) boreFan Guard: Split design with close wire spacing. 1/4" (6-5/16 mm) diameter probe will not enterMounting Holes: Two 9/16". (14-5/16 mm) diameter holes at topHeating Elements: Three long-life, low-watt-density, high grade metal-sheathed elementsSafety Protection Circuit: Snap action bimetal switch, rated for 100,000 cycles at 10 amps. Part of secondary thermal protection circuit with dedicated contactor. Independent of main control circuitControl Circuit: 120 V, 0.128 amps, 15 VA. (Grounded)Slim Junction Box: 10-1/4" (230mm) x 8.00" (180mm) x 6-3/4" (172mm)Control Transformer: Multi-tap primary, 120 V secondary, 50 VAContactor: 75 amps. Rated for 1,000,000 mechanical operations. 15 VA coil (separately fuse-protected)Heat Transfer Fluid: Long life formulated propylene glycol and waterCabinet Material: 12 ga. (0-1/8") (2-5/8 mm) steel. Epoxy coated with five-stage pretreatment, including iron phosphate. Optional stainless steelOverpressure Protection: Preset 100 psig (690 kPa) pressure relief valve, aluminum body, no field serviceable partsCore: Steel with integral aluminum fins, vacuum charged and hermetically sealedConduit Material: Heavy walled, 0-1/8" (3-1/8 mm) steelOptional Built-In Thermostat: Explosion-proof. 36 F to 82 F (2 C.